Day 21 Look for invisible keyboard focus when tabbing through a page.

Look for invisible keyboard focus when tabbing through a page.

Keyboard accessibility is one of the most important aspects of the web accessibility.Some computer users are physically unable to use a mouse. Others prefer using a keyboard because it’s often more efficient. Computers in general, and web browsers specifically, can be operated with keyboard alone. 

In web browsers, users can use the tab key to jump between focusable elements (i.e., links, form fields, and any other content that has been added to the tab order with the HTML tabindex attribute). When an item has keyboard "focus", it can be activated or manipulated with the keyboard. A sighted keyboard user must be provided with a visual indicator of the element that currently has keyboard focus. A basic focus indicator is provided automatically by the web browser and is typically shown as a border (called an outline) around the focused element. Invisible keyboard focus  can introduce difficulties for users who rely on a keyboard for navigation.

I tried to tap through a website & couldn't find focus for most of the elements.